RMAN and Split Mirror Disk Backups [ID 302615.1]
对于数据库采用第三方软件备份的技术,使用rman备份需要注意的东西如下metalink文档"Checked for relevance on 28-Jun-2009"PURPOSE-------Instruction using RMAN with split mirror backups. SCOPE & APPLICATION...
分析表时引发的一个ora-600 [qkssao2s1]
SQL> create table test as select * from dba_objects;Table createdSQL> create index test_object_id on test(object_id);Index createdSQL> create index test_data_object_id on test(data_object_id,1);-...
导出用户下的所有表
当然,最简单的就是使用pl/sql,选择表,然后导出。但是也有变态的,想导出某用户下的所有表,其他的(package、procedure、trigger,trigger)不导出,则需要把表明一一列出。现在才发现10g有这样一个函数。整个...
How the CBO Transforms ORs into Compound Queries
If a query contains a WHERE clause with multiple conditions combined with OR operators, then the optimizer transforms it into an equivalent compound query that uses the UNION ALL set operator, if this...
oracle的like
SQL> create table test as select * from dba_objects;Table createdSQL> create index object_id on test(object_id);Index createdSQL> exec dbms_stats.gather_table_stats(user,'TEST');PL/SQL proced...
like为什么会这样?
生成表的代码CODE:SQL> create table test as select * from dba_objects;Table createdSQL> insert into test select * from test;50397 rows insertedSQL> commit;Commit completeSQL> create index test_object_...
一个参数引发的血案
新来公司,查看公司以前的故障文档,发现了这么一条:oracle原厂的人对生产库进行了参数调整,其中有一个参数为_no_or_expansion,默认值为false,被他们改成true。这条参数的作用是,在where条件后,本来是可以使用...
Log buffer issues in 10g
原文地址:http://yumianfeilong.com/html/2009/04/08/340.html(转自玉面飞龙的博客)Oracle10g中的redo log buffer大小不是由参数文件initSID.ora中的log_buffer决定的了。而是由oracle内部的算法计算而出。Fro...
in 与 exists
再次温习了一遍in和exists压力测试拿个东西,说执行计划很怪(主要是cost 怪)SQL> explain plan for ( 2 2 SELECT * 3 FROM lpgrpedoritem p 4  ...
exp does not support binary_float or binary_double
SQL> select * from v$version;BANNER----------------------------------------------------------------Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - 64biPL/SQL Release 10.2.0.1.0 - Productio...
ORA-01775与ORA-00942
在系统易用中,经常使用synonym,以便于管理或者权限控制。因此会经常遇到ORA-01775: 同义词的循环链oracle的解释是这样的:ORA-01775: looping chain of synonyms Cause: Through a series of CREATE synonym state...
expdp 的奇怪问题
现在环境为生产的前一天数据同步环境,开发人员误删数据,想恢复几张表,于是用用户导入相关表impdp slisdata/**** directory=TEST_DIR dumpfile=slisdataDP_20090406.dmp tables=LCCUSTOMSOSDETAILImport: Release ...